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A Novel Lead Design for Modulation and Sensing of Deep Brain Structures.

Allison T Connolly, Rio J Vetter, Jamille F Hetke

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    New 3-D deep brain stimulation (DBS) arrays offer higher electrode density for precise Parkinson's disease treatment. These novel DBS arrays enable better sensing and modulation of brain activity, improving therapeutic outcomes.

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    Area of Science:

    • Neuroscience
    • Biomedical Engineering
    • Medical Devices

    Background:

    • Current deep brain stimulation (DBS) lead technology has limitations in electrode contact density.
    • Higher electrode density is needed to improve spatial precision and enable adaptive DBS strategies.
    • Sensing local field potential activity is crucial for advanced DBS applications.

    Purpose of the Study:

    • To develop and characterize a novel thin-film probe technology for DBS with enhanced electrode contact density.
    • To evaluate the functionality of 3-D conformation DBS arrays in preclinical models.
    • To explore the potential for improved spatial precision and adaptive DBS.

    Main Methods:

    • Microfabrication of thin-film planar arrays and assembly onto a cylindrical carrier for 3-D conformation.
    • Chronic implantation of the novel DBS arrays in the subthalamic nucleus and globus pallidus of parkinsonian nonhuman primates.
    • In vivo testing of stimulation effects and recording of neural activity.

    Main Results:

    • First in vivo data from chronically implanted 3-D DBS arrays in nonhuman primates.
    • Demonstrated reduction in parkinsonian rigidity via stimulation through the arrays.
    • Observed orientation-dependent motor capsule side effects and heterogeneous basal ganglia oscillatory activity at a finer scale.

    Conclusions:

    • The developed 3-D DBS arrays serve as an enabling tool for monitoring and modulating deep brain activity.
    • Higher-density electrode contacts in DBS lead technology can facilitate sculpted current flow and biomarker sensing.
    • This technology holds promise for advancing therapeutic strategies in neurological disorders.